Global Footprint Network

"The Global Footprint Network is committed to fostering a world where all people have the opportunity to live satisfying lives within the means of Earth's ecological capacity. We are dedicated to advancing the scientific rigor and practical application of the Ecological Footprint, a tool that quantifies human demand on nature, and nature's capacity to meet these demands. Created in 1993 by Mathis Wackernagel and William Rees, the Ecological Footprint is now in wide use by governments, communities, and businesses to monitor current ecological resource balances and to plan for the future."

Source: GFN